Keys: W/S or arrows to drive and brake, A/D to steer, Space for the handbrake, Q/E to shift, R to reset (on a track: back onto the road; Shift+R or hold Reset: restart the track), C for camera. A gamepad works too: triggers, left stick, A for the handbrake, bumpers to shift.
Reverse: in Auto, hold brake when stopped; in Manual, shift down from 1st. The skidpad circle is 40 m across the pad from the start; the humps, kicker and 10 % slope are to the sides.